bbrroowwnn said

sure beats the old days of cutting new seats using a stone on a drill with a pilot shaft coming up through the guide to keep you centered....that is the way we used to do it in the 70s and 80s....then hand lap them in with lapping compound and the wooden dowel with the suction cups on the end...and a 3 or 5 angle valve job??? what was that....your stone had one angle...I think 45 degrees and that was it......well there was no such thing as a cnc back then until mid to late 80s

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